Designed with compact sizes, it allows you to choose the right diffuser for your fish tank, and its transparent surface makes it easy to monitor. Constructed from nanometer material for durability and performance. Available in multiple sizes to suit various tank requirements. An essential device for maintaining healthy aquatic life by supporting the respiration process of fish and promoting oxygen production for water plants. Ideal for use in fish tanks and aquariums. Item Name: Air Diffuser Material: Nano Suitable for: Fish Tank, Aquarium Features: Quiet operation, high dissolved oxygen, fine bubble output Size Details: Size S: Air Plate Diameter: 3.5cm/1.4", Suitable Tube Diameter: 0.4cm/0.16" (Approx.) Size M: Air Plate Diameter: 5cm/2", Suitable Tube Diameter: 0.4cm/0.16" (Approx.) Size L: Air Plate Diameter: 8cm/3.1", Suitable Tube Diameter: 0.4cm/0.16" (Approx.) Size XL: Air Plate Diameter: 10cm/3.9", Suitable Tube Diameter: 0.4cm/0.16" (Approx.) Size 2XL: Air Plate Diameter: 15cm/5.9", Suitable Tube Diameter: 0.4cm-0.8cm/0.16"-0.32" (Approx.) Size 3XL: Air Plate Diameter: 20cm/7.9", Suitable Tube Diameter: 0.4cm-0.8cm/0.16"-0.32" (Approx.) Package Includes: 1 x Air Plate